/**
 * This file is part of Graylog.
 *
 * Graylog is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Graylog is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Graylog.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.graylog2.shared.metrics.jersey2;

import javax.annotation.Priority;
import javax.ws.rs.Priorities;
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerRequestFilter;
import javax.ws.rs.container.ContainerResponseContext;
import javax.ws.rs.container.ContainerResponseFilter;
import java.io.IOException;
import java.lang.reflect.Method;

import static com.codahale.metrics.MetricRegistry.name;

@Priority(Priorities.HEADER_DECORATOR)
public abstract class AbstractMetricsFilter implements ContainerRequestFilter, ContainerResponseFilter {

    protected String chooseName(String explicitName, boolean absolute, Method method, String... suffixes) {
        if (explicitName != null && !explicitName.isEmpty()) {
            if (absolute) {
                return explicitName;
            }
            return name(method.getDeclaringClass(), explicitName);
        }
        return name(name(method.getDeclaringClass(),
                method.getName()),
                suffixes);
    }

    @Override
    public abstract void filter(ContainerRequestContext requestContext) throws IOException;

    @Override
    public abstract void filter(ContainerRequestContext requestContext, ContainerResponseContext responseContext) throws IOException;
}